Steam-pump.



H. H. WESTINGHOUSE.

STEAM PUMP.

APPLICATION FILED NOV. 27,1912. 7 1,109, 1 57, Patented Sept 1,191 1 III Q\ I IHHIHHH I Q Q INVENTOR '1 VI/4W" fiawm WITNESSES THE NbR RlsPETERS CGIPHOTD-LITHQ. WASHINGTDN. D. c.

mmo 1 OFFICE.

HENRY WESTINGHOUSE, 2 NEW Yeas A umes TO THE WESTINGHOUSE AIR BRAKE ows-Y. OF WILMEBPINGQ rEN s X- erva a sQaf QaAr QN OF PENNSYLVANIA.

sm t-PUM Specification of Letters ,Eatent.

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To all whom it may concern.

Be it known that I, HENRY H. \VnsrrxsnoUsu, a citizen of the UnitedStates, residing at New York, inthe county of New York and State of NewYork, have invented new and useful Improvements in Steam- Pumps, ofwhich the following is' aspecification.

This invention relates to fluid compressors, and more particularly tomeans for cooling the cylinder in which the fluid is compressed. W

It is well known that in the compression of fluid considerable heat isproduced which is transmitted to the cylinder walls and piston and oftenthe temperature ofthe cylinder walls is raised to such a point astodestroy or decompose the cylinder lubricant so that proper lubricationis interfered with. It is thushighly desirable to provide means forkeeping the temperature of the cylinder walls and piston down to a pointat which the lubricant can act properly.

The principal object of my invention is to provide means for cooling thecylinder walls, in which exhaust steam from the compressor is employedas the cooling agent.

Actual tests of temperatures developed in a fluid compressor show thatthe temperature of the fluid compressed runs much higher than thetemperature of the exhaust steam from the compressor. For example, inone test it was found that the temperature of the compressed fluid wasabout 490 degrees in compressing the fluid to 100 pounds pressure whilethe temperature of the exhaust steam was approximately 300 degrees.

he much lower temperature of the exhaust steam therefore permits of itsuse as a cooling agent for cooling the compressor piston and the wallsof the cylinder.

In the accompanying drawing; Figure 1 is a front elevation, partly insection, of a compound steam driven fluid compressor with my improvementapplied thereto; and Fig. 2 a transverse section on the line ca of Fig.1.

As shown in Fig. 1 of the drawing, the fluid compressor may comprise asteam cylinder casing 1, a fluid compressor cylinder casing 2, anintermediate section 3 between the casings l and 2, a steam valve head4, and a fluid cylinder head 5. The compressor shown is of the wellknown compound type having a high pressure steam cylinder 6 opposite thelow pressure fl uid' cylinder 7 and the low pressure steam cylinder 8opposite the high pressure fluid cylinder 9. Within the steam cylinder 8ismounted steam piston 10 which is connected by piston rod 11 with highpressure fluid compressing piston '12.

connected by a passage 16 to the exhaust.

steam passage 17 leading to the exhaust pipe 14, a drain pipe 18 beingprovided at the lowermost portion of the chamber 15 to permit the escapeof the products of condensation. It will now be evident that when thecompressor is running, exhaust steam from the pump circulates around thehigh pressure air cylinder and thereby maintains the cylinder walls andpiston relatively cool, so that the lubricant employed in the cylinderwill not be destroyed as to its lubricating qualities.

While the construction illustrated in the drawing provides for only apartial flow of exhaust steam around the fluid compressing cylinder, ifdesired the final exhaust may be an opening to the atmosphere directlyfrom the cooling chamber 15, so that all of the exhaust steamwill passaround the cylinder.

The invention is particularly desirable in connection with a compoundfluid compressor but may of course be employed with a simple compressor.

lVhile the invention is described in connection with the cooling of thehigh pressure cylinder, it will be understood that the low pressurecylinder may also be jacketed and cooled by the flow of exhaust steam aswell as the high pressure cylinder.

By means of my invention, the fluid compressing cylinders are kept coolwithout the employment of additional apparatus for circulating water orthe like around the cylinder, such as heretofore employed, as accordingto my improvement it is only necessary to connect the exhaust steamoutflow to the cooling jacket to accomplish the desired result.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a fluid compressor, the combination with a cylinder, a pistontherein for compressing fluid, a steam cylinder, and a piston thereinoperated by steam for actuating said fluid compressing piston, of acooling jacket surrounding the fluid compressing cylinder and a passagefor supplying exhaust steam from said steam cylinder to said jacket.

2. In a compound fluid compressor, the combination With high and lowpressure steam cylinders and high and low pressure fluid compressingcylinders, of means for cooling the Walls of the high pressure fluidcompressing cylinder by the flow of exhaust steam from the steamcylinders.

3. In a cross compound fluid compressor, the combination with high andlow pressure cylinders containing pistons for compressing fluid, a highpressure steam cylinder containing a piston connected to the lowpressure fluid compressing piston, and a low pressure steam cylindercontaining a piston connected to the high pressure fluid compressingpiston, of a cooling jacket for the high pressure fluid compressingcylinder and means for supplying exhaust steam from the low pressuresteam cylinder to said jacket.

In testimony whereof I have hereunto set my hand.

HENRY H. WESTINGHOUSE. Witnesses:

A. M. CLEMENTS,

S. W. KEEFER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

-Washington, D. C.

